Recommisioning

[lancianut666]

Have you any pictures of your issues as I have not yet come across a hole being too big for the bolts?
Clarkey

[Spider2]

pictures will not really help.
The hole in the engine block that the generator attachment bolt goes through has either been widened/damaged/worn by the bolt moving in it or an insert/bush is missing. The result is the generator can rock from side to side if the top stay is loose. When the top stay is tightened it pulls the front of the generator towards the engine block so the pully is not aligned with the crank pulley. It works but it must be putting a large load on the front generator bearing.
I will try and draw a diagram to explain the problem

[Spider2]

I think I probably have a simpler reason for this problem: maybe the wrong generator is fitted. The generator attachment bracket holes are smaller than the hole in the engine block.

[lancianut666]

Some pictures of a recent strip down of a S2/3 engine showing the bottom dynamo mounts.
Clarkey

[Spider2]

That is very useful. It confirms that the bolt fitted should be larger and that the generator is not from a S2. I will be enlarging the holes on the bracket to accept the bigger bolt.
I also note the rear hole in the engine is threaded. Does any one know the bolt and thread size?

[Spider2]

i meant the rear hole of the dynamo.